On Sunday, security vendor F-Secure it had no confirmed reports of the worm spreading outside of Australia. F-Secure advises jailbroken iPhone users who want to secure their phones to

News of the worm first started spreading several days ago, when users on an Australian technology discussion board that their iPhone wallpaper had been changed without authorization.

The worm's code was published Sunday by Joshua "JD" Davison, managing director with Australian ISP reseller JelTel, who earlier published a with Towns.

The worm may have upset iPhone users, but Apple may not mind. The iPhone's creator has been trying to put an end to jailbreaking for years, that it causes security and performance problems.

"They might be a little bit pleased to hear that people have got themselves into hot water," Cluley said.